food chains, food webs, trophic levels

1. 11-28-16 This is a food
chain. Can
you see
what eats
what?
Draw thisDraw this
foodfood
chain inchain in
youryour
notebooknotebook
bee
snake
frog
dragonfly
flower

2. 11-28-16
Agenda
1. Ecology Lesson
Objective
•Create a
food web
and explain
how energy
moves
through it

3. As always dear students…
• Key concepts are underlined
• Vocabulary terms are in green

4. Food
Chains
and Food
Webs

5. • Organisms getOrganisms get
their energy fromtheir energy from
the food they eatthe food they eat

6. • Plants get their energy from the sunPlants get their energy from the sun
• They use that energy to make their own
food.

7. • A food chain is a pathway that tells
us what eats what
• Food chains are over-simplified models of
nature

8. • A food web
shows how
several food
chains
overlap and
connect to
each other

9. All food webs start with
producers (aka
autotrophs)

10. • Organisms that
must eat other
organisms to
survive are called
consumers (aka
heterotrophs)

11. There are different types of consumers
• Herbivores – eat only plants
• Carnivores – eat only the flesh of other
organisms
• Omnivores – eat both plants and animals
• Detritivores – eat waste or dead organisms
like dead animals, fallen
leaves, poo

12. • Organisms that break down the bodies of
dead plants and animals are called
decomposers
• Mostly bacteria and fungi

13. Quick Check
Older partner
• Give an example of a
producer, an herbivore,
and a carnivore from a
grassland ecosystem
Younger partner
• Give an example of a
producer, an herbivore,
and an omnivore from a
forest ecosystem

14. • The first
consumers in a
food web are
called the
PRIMARY
CONSUMERS
– They eat the
producers
• The second
consumers in a
food web are the
SECONDARY
CONSUMERS
– They eat the
animals that ate
the plants
• The third
consumers are
the TERTIARY
CONSUMERS,
and so on

19. Directions for Food Web Activity
1. This is an individual assignment.
2. The organisms in the food web must bemust be
drawn and their names writtendrawn and their names written
beneath them.
3. Each organism is drawn only once in the
food web.
4. The questions need to be answered in
complete sentences on the back of the
food web diagram.

20. Did you “get it”?
• Circle the producer on your food web.
• Put a box around one of the primary
consumers on your food web.
• Put a triangle around one of the
secondary consumers on your food web.
• Write what the arrows show in the top right
corner of your paper.